726894638 has 4 divisors (see below), whose sum is σ = 1090341960. Its totient is φ = 363447318.

The previous prime is 726894613. The next prime is 726894643. The reversal of 726894638 is 836498627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836498627 = 37 ⋅22608071.

It is a self number, because there is not a number n which added to its sum of digits gives 726894638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181723658 + ... + 181723661.

It is an arithmetic number, because the mean of its divisors is an integer number (272585490).

Almost surely, 2^726894638 is an apocalyptic number.

726894638 is a deficient number, since it is larger than the sum of its proper divisors (363447322).

726894638 is a wasteful number, since it uses less digits than its factorization.

726894638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363447321.

The product of its digits is 3483648, while the sum is 53.

The square root of 726894638 is about 26960.9836244897. The cubic root of 726894638 is about 899.1327604817.

The spelling of 726894638 in words is "seven hundred twenty-six million, eight hundred ninety-four thousand, six hundred thirty-eight".